Children can still grow taller after changing their voices. A child’s voice changing signals the onset of puberty and is not directly related to whether or not the child grows taller.
Children usually change their voices at the age of 12-14 years old, and the vast majority of children’s height can grow until 18-20 years old. Whether or not a child grows taller depends mainly on whether or not the child’s epiphyses have closed. If the epiphyses of the long bones have closed, the child’s height will not continue to grow; if the epiphyses of the long bones have not closed, the child’s height will still continue to grow.
When a child reaches puberty, the height growth rate is very fast, parents must pay attention to improve the child’s diet, give the child more food rich in high quality protein and calcium, such as milk, eggs, lean meat, bone broth and so on. You can also encourage your child to participate in more physical exercise, such as playing basketball, jumping rope, etc., and at the same time to ensure that your child has enough sleep.